Caves can be divided into three
zones depending on how much light they receive: entrance, twilight and
dark. Light is a major factor limiting the size of the food chains and
webs in an ecosystem. Food chains show the flow of energy from sun to plants,
which use light in photosynthesis to make food, which is then passed on
to herbivores and carnivores. As the amount of light decreases, the amount
of energy driving the food chain also decreases, the number and size of
plants decreases and fewer numbers of animals can be supported. |
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